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(No ModeL) Y M. M.'WHITTEMURE, R. H. ARNOLD, 82; E. S. STAPLES. STEAM GENERATOR.

No. 326,186. Patented Sept. 15, 18885. y

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UNITED STATES PATENT EETCE.

M. MATURIN VHITTEMORE, ROUSE H. ARNOLD, AND ELlSI-IA S. STAPLES,

' OF NORWICH, CONNECTICUT..

.STEAM-GENERATOR.

SPECIFEGATON forming part of Letters Patent No. 326,186, datedyeptember 15, 1885.

Application filed June 20, 1885.

To all whom t may concern,.-

Beit known that we, M. MATURIN Wi-ir'r'rn- MORE, RoUsE H. ARNOLD, and ELrsHA S. STA- PLEs, citizens ofthe United- States, residing' at Norwich, New London county, Connecticut, have made certain new and useful Improvements in Steam-Generators, which irnprovements are fully set forth and described in the following specification, reference being' had to the accompanying drawings, in which- Figure l is a front elevation; Fig. 2, a vertical sectional view through the center of said generator, and Fig. 3 a cross-section on line rv x of Fig. l. Fig; 4 is a detached perspective view of the boiler-section.

Our invention relates to certain improvements in that class of steam-generators used principally tor heating purposes, our immediate object being to simplify and cheapen the construction of such generators, and to so connect the several sections that they may be easily and quickly taken apart to repair the same when necessary.

In many of the steam-heating devices now in common use the cost of tt-ing up the screwjoints and assembling the many sections, added to the cost of materials, brings the retail price to a point beyond the means of the average individual. It is our intention to construct aheating device having no screw-joints, and in which the boiler proper may be lifted out of and away from the shell of the heater by simply removing the cap or dome, as fully described hereinafter.

Referring to the several drawings, the letter A represents the outer shell or case of our generator, made either of sections of cast-iron or a single jacket of boiler-iron, as preferred.

B represents a base-plate, and C a crownsheet, both being provided with an annular flange or rim, which projects over the cylindrical case A, as will be understood by refer ringto Fig. 2.

The fire-pot a and ash-pit b are made of a single casting, whose upper and lower ends are formed as rings or disks c c', which fill the space .within the shell A, disk c resi-ing on the base-plate B, above referred to. The barrel of said re-pot casting is preferably drawn in near its central portion, and within the waist (No model.)

be of any practical form.

h h represent legs formed as integral' parts of the fire-pot casting, and extending upward therefrom to furnish supports for the boiler E, which boiler-section E forms a part of our y invention, and is shaped as a corrugated castrnetal cylinder having a central longitudinal hole, also corrugated, and heads i fr', the whole being bolted securely together. Extending from end to end are draft-tubes k k.

When it is desired to assemble our steamgenerator, the fire-pot section is placed in position on baseplate B, and the shell A is slipped down over said repot. The boilersection E is now lowered down within said shell until the lower head rests on the legs h. To hold the boiler-section in a central position we now insert two or more wedges, a, between said boiler and the outer shell. (See Figs. 2 and 3.) The crown-sheet@ is then placed on the shell A, its ilange passing over saidshell and preventing the displacement of the crownsheet.

G represents a tubular coal chute, which is suspended in a central hole in the crownsheet, and extends through the central opening in the boiler-section nearly to the fire-pot. The capacity of said chute is such that it may contain a supply of coal sufficient to keep the re alive several hours. A cap, o, covers the upper end of said chute.

Leading outward from the crown-sheet is a smoke and draft-pipe,K, of the usual const-ruction.

19 represents a steam-pressure gage; q, a water-gage; r,the steam-pipe, from which branch pipes lead to the several radiators throughout a house. s represents a feed-water pipe, and t a blow-off cock connected with the bottom of the boiler. These several gages and pipes are substantially the same as corresponding elements in other boilers of this class and need no detailed description.`

N represents an automatic draft-regulator controlled and actuated by steam-pressure, and connected by a chain or cord, a, with the draft-regulating doors P B. One of said doors, P, is located near the base of the generator and leads into the ash-pit. rlhe other door, B, is lo` thus formed is located a grate, d, which may il IOO cated above the upper iiange ofthe firepob, and is provided as a check-damper to allow cold air to enter and deaden the body of fire. The lower door is hinged at its upper side and the upper door at its lower side, so that when both are connected to cord u they move in opposite directions-that is to say, as the pressure of steam increases and it is desired to check the fire, the lever-arm w is gradually depressed, allowing door P to close and door R to open slightly. This movement shuts off the lower draft and allows cold air to enter door R to check the tire.

The construction of the draft-regulator we do not claim as our invention.

Should the boiler-sections become cracked or otherwise injured, the several pipes and gages are disconnected and the chute G removed. The crownsheet is then taken oli', and the boiler-section may be lifted out and a new one substituted, the whole operation requiring less than a halfhour, and the entire expense being small when compared with the cost of repairing many of the so-called sectional steam-boilers.

With a construction such as we have described the heated air passes directly from the iirepot upward, completely encircling the boiler-section, also passing through tubes k and through the central hole in the boiler, healing the body of water quickly and holding it at a desired temperature with a very low fire.

The wedges n, described as independent pieces, may, if preferred, be cast as integral parts of the outer shell, A, or as parts ofthe boiler-section.

Having thuspdescribed our invention, we

claim as new and wish to secureby -Letters Patent- 1. In a steamgenerator of the class herein referred to, the combination of the outer cylindrical'shell, A, crown-sheet C, a fire-pot having an integral upper ring concentric with said outer shell and a series of integral legs, h, and a boiler-section, substantially as herein described, resting on legs h, and located immediately ovcr the lire-pot, as and for the object specified. l

v2. In combination with case A and a firepot having both a ring, c, and legs h, a boilersection formed as a cylindrical chamber corrugated longitudinally, and provided with a series of vertical draft-tubes, k, and a series of wedges, n, so interposed between the boiler and outer shell, A, that an annular fire-space is formed around said boiler, all being arranged substantially as described, and for the objects specified.

3. In combination with the cylindrical case A, a re-pot having ring c, concentric with said case, and a series of upwardly-projecting legs, h, a boiler-section of the form described, arranged to rest on said legs h, the crownsheet C, and a coal-chute suspended in said crown-sheet and extending through the renter of the boiler-section nearly to the iirepot, all being substantially as described, and for the object set forth.

M. MATURIN WHITTEMORE. ROUSE H. ARNOLD. ELISHA S. STAPLES.

Witnesses:

FRANK H. ALLEN, TYLER J. HOWARD. 

